How to delete a NAT address?

I have set up Hestia on a Proxmox VM that gets an unrouted IP address from a DHCP server on the network router, but has a manually added routed IP address which doesn’t route through the network router but through an upstream router.
However, the installer has assumed that the Internet facing IP of the network router is a NAT address for the server. How can I delete this NAT address completely?

I’ve taken the NAT IP address out of the ip configs in /usr/local/hestia/data/ips now and that seems to have worked, but is there a way of doing it with the CLI ?